Did they refuse to allow a faster party to play through?
If i had been in the shoes of the people being held up I would have tried to do that (Maybe they did, do we know for sure that they didn't? the media doesn't like to report things like that, and we know from the existing reporting that the two sides had words). But Just because they (allegedly) didn't take the best countermeasure doesn't mean the people holding them up weren't at fault. Maybe THEY should have said why don't you play through why is the burden always on white people to get it right. Never black people?
This article is a little light on details but since you won’t stop asking questions that could have easily been answered by yourself, I did a little research for you.
in the past, “players who have not followed the rules, specifically pace of play, have voluntarily left at our request as our scorecard states. In this instance, the members refused to leave so we called police to ensure an amicable result. … During the second conversation we asked members to leave as per our policy noted on the scorecard, voices escalated, and police were called to ensure an amicable resolution.”
It seems they refused to follow writer rules and then got mouthy...